Download E32! Service Manual

E32 CONVECTION
OVEN
SERVICE MANUAL
Revision 1/F3508
-1-
WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED
OUT BY QUALIFIED PERSONS ONLY.
Revision 1/F3508
-2-
CONTENTS
This manual is designed to take a more in depth look at the E32 convection oven for the purpose of
making the unit more understandable to service people.
There are settings explained in this manual that should never require to be adjusted, but for
completeness and those special cases where these settings are required to change, this manual
gives a full explanation as to how, and what effects will result.
SECTION
PAGE NO.
1.
SPECIFICATIONS .........................................................................................................5
2.
INSTALLATION .............................................................................................................7
3.
OPERATION ...................................................................................................................10
3.1
3.2
4.
Description of Controls
Explanation of Control System
MAINTENANCE .............................................................................................................13
4.1
4.2
Cleaning
Routine Procedures
5.
TROUBLE SHOOTING GUIDE ......................................................................................15
6.
SERVICE PROCEDURES ..............................................................................................18
6.1
6.2
6.3
6.4
Fault Diagnosis
Access
Replacement
Adjustment / Calibration
7.
ELECTRICAL SCHEMATICS ........................................................................................34
8.
ELECTRICAL WIRING DIAGRAMS ..............................................................................35
9.
SPARE PARTS ..............................................................................................................36
10.
ACCESSORIES / OPTIONS ..........................................................................................37
11.
PARTS DIAGRAM .........................................................................................................38
11.1
11.2
12.
Main Assembly
Control Panel Assembly
SERVICE CONTACTS ..................................................................................................42
IMPORTANT: MAKING ALTERATIONS MAY VOID WARRANTIES AND APPROVALS.
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Revision 1/F3508
-4-
1. SPECIFICATIONS
800
(31.5)
260
(10.2)
645
710
(28.0)
50
60
(2.35)
(1.95)
75
(2.95)
FRONT
SIDE
PLAN
LEGEND
- Electrical connection entry point
- Water entry - 3/4” BSP hose connection
Dimensions shown in millimetres.
Dimensions in inches shown in brackets.
Revision 1/F3508
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(25.4)
MODEL: E32
LOCATION
To ensure correct ventilation for the motor and
controls the following minimum installation
clearances are to be adhered to:
Rear
Left-hand side
Right-hand side
40mm / 1.5“
40mm / 1.5”
40mm / 1.5”
OVEN INTERNAL DIMENSIONS
Width
468 mm / 18.5”
Height
533 mm / 21”
Depth
711 mm / 28”
Oven Volume
0.18 m³ / 6.3 ft³
OVEN RACK SIZE
Width:
Depth:
460 mm / 18”
660 mm / 26”
No of rack positions:
4
Rack position spacing: 125 mm / 5”
ELECTRICAL SUPPLY
OPTIONS
SPECIFICATION
208 V AC 60 Hz, 28.8 A , 6.0 kW@ 208 V
220-240 V AC 60 Hz, 27.8 A, 6.7 kW @ 240 V
208-220 V AC 50 Hz, 28.8 A, 6.0 kW @ 208 V
230-240 V AC 50 Hz, 27.8 A, 6.7 kW @ 240 V
ELECTRICAL
CONNECTION
CONDUCTOR SIZES
Minimum: 4mm² / 16 AWG
WIRE
WATER SUPPLY CONNECTION
Max Pressure 550 kPa / 5.5 bar / 80 psi
Min Pressure 100 kPa / 1.0 bar / 15 psi
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2. INSTALLATION
WARNING: THIS APPLIANCE MUST BE GROUNDED.
WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED
OUT BY QUALIFIED PERSONS ONLY.
It is most important that the oven is installed
correctly and that the operation is correct before use. Installation shall comply with local
electrical, health and safety requirements.
BEFORE USE
Operate the oven for about 1 hour at 200°C
(400°F) to remove any fumes or odours which
may be present.
BEFORE CONNECTION TO POWER
SUPPLY
Unpack and check unit for damage and report
any damage to the carrier and dealer. Report
any deficiencies to your dealer. Fit the feet
which are packed inside the oven. Fit door
handle to oven door. Check that the available
power supply is correct to that shown on the
rating plate located on the right-hand side
panel.
ELECTRICAL CONNECTION
Remove rear cover panel to allow access to
the terminal block and strain relief cable
clamp. The cable can be fitted through the
small grommet and held by the cable clamp.
Connect cable to the terminals as marked.
Refit cover panel.
208 V AC 60 Hz, 28.8 A , 6.0 kW@ 208 V
220-240 V AC 60 Hz, 27.8 A, 6.7 kW @ 240 V
208-220 V AC 50 Hz, 28.8 A, 6.0 kW @ 208 V
230-240 V AC 50 Hz, 27.8 A, 6.7 kW @ 240 V
Figure 2.1
Refer to specifications section for minimum
wire connections required.
LOCATION
To ensure correct ventilation for the motor and
controls the following minimum installation
clearances are to be adhered to:
Rear
Left-hand side
Right-hand side
WATER CONNECTION
A cold water supply should be fitted to the
water inlet (3/4” BSP hose connection) which
is located on the rear of the right hand side of
the unit.
40mm / 1.5“
40mm / 1.5”
40mm / 1.5”
Position the oven in its allocated working
position. Use a spirit level to ensure the oven
is level from side to side and front to back. (If
this is not carried out, uneven cooking could
occur). The feet/legs used with bench or floor
mounting or provided with stands are adjustable and will require adjusting in levelling the
unit. It should be positioned so the operating
panel and oven shelves are easily reachable
for loading and unloading.
Alternately, a connection elbow and sealing
washer is supplied with this unit for direct
connection of a 1/2” ID hose, and is
recommended for easy installation and service.
IMPORTANT:
THE OVEN VENT
LOCATED ON THE CABINET TOP
MUST NEVER BE OBSTRUCTED.
IMPORTANT: MAXIMUM INLET WATER
PRESSURE IS 550 kPa / 80 psi.
Revision 1/F3508
Connect water supply - Max inlet pressure
80psi / 550kPa.
Turn on water supply to check for leaks.
-7-
DOOR HANDLE INSTALLATION
1. Open oven door.
2. Remove two screws (item 2).
3. Remove the two screws (item 3) from the
handle (item 1).
4. Install the handle bracket through the slot
on the door side.
5. Screw in the two screws (item 2) fully,
then fully screw in the previous two
screws (item 3). Ensure that they are
tight.
Figure 2.3
DOUBLE STACKING UNITS
When it is desired to mount an E32 Turbofan
oven on an E87 prover, a double stacking kit
must be used. Available from your dealer or
Turbofan distributor. (see Spare Parts).
1
When mounting one oven on top of another, a
double stacking kit is also required.
3
WARNING:
THE ELECTRICAL
SUPPLY MUST BE DISCONNECTED
BEFORE UNITS ARE STACKED.
2
Assembly Steps:
Bottom Unit
Figure 2.2
1. Lay unit on back and remove 1" or 4" feet
already fitted to unit. Fit adjustable leg
and secure with (16x) M6 x 16 taptite
screws. Stand unit up.
OVEN RACKS
The oven is supplied with four general
purpose oven racks. These racks incorporate
two important safety features:
2. Unscrew vent hood plate from bottom
oven. Remove and discard hood plate
and spacer tubes. Replace two vent hood
screws on the left hand side from the front
and screw in completely to secure outer
wrapper to vent tube. Use RTV to seal
the other two holes.
1. Self Supporting: When fitted, the oven
racks are self supporting and will not drop
or angle down when the racks are
withdrawn during operation, when loading
and unloading products on racks or when
attending to the product being cooked
during it’s cook cycle.
3. Position shroud back on top of bottom unit
so that it is positioned correctly over oven
back. Position flue duct on bottom unit so
that it is positioned centrally in shroud
back flue cut-out and is flush with the
oven back. Check that the oven vent is
covered and mark the six hole positions (3
down each side of the flue duct) on the
oven wrapper.
2. Auto Supporting:
The oven rack
supports incorporate a special retaining
tab which provides a positive stop to each
oven rack and stops it’s inadvertent
removal during normal operation.
To fit the oven racks ensure that the rack back
stop is positioned at the rear of the oven and
install by following the steps shown in the
diagram below.
To remove oven racks reverse the procedure.
Revision 1/F3508
4. Drill six ø 3.5mm holes in the oven
wrapper where marked.
5. Screw the flue duct to the wrapper with six
1/2" x 8A pozi screws into these holes.
-8-
4. Screw together with four 1/2" x 8A pozi
screws supplied, the chimney to the flue
duct of the bottom unit. Drill two Ø3.5mm
holes in the top rear of the top unit
through the two round holes, one each
side of the chimney. Now screw the
chimney to the rear of the top unit with the
two remaining 1/2" x 8A pozi screws.
Top Unit
1. Tip oven onto its back and remove the 1"
or 4" feet screwed into the base.
2. Assemble the four sides of the shroud
(shroud front, shroud back, shroud sides
(x2)) with the 3/16" screws as shown. Do
not tighten the screws until the ovens are
stacked.
5. Adjust the four legs to level ovens.
3. Screw the shroud assembly to the base of
the oven using the 3/8" screws and
washers so that all faces of the shroud are
flush with the sides of the oven base. Be
sure to have the large flange of the shroud
back at the rear of the oven.
RATING PLATE LOCATION
The rating plate for the E32 convection oven
is located at the bottom right corner of the RH
side panel.
Stacking the Ovens
1. Remove the outside two screws along the
top rear of the bottom oven.
2. With two or three persons, lift the top oven
onto the bottom oven and position so that
the down folds on the shroud sides and
back all butt hard up around the back and
sides of the oven wrapper.
3. Secure top unit into position by replacing
the two outside screws of the four
previously removed from the top rear of
the bottom unit.
Rating Plate
Figure 2.5
Figure 2.4
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3. OPERATION
NOTE: A full user’s operation manual is supplied with the product and can be used for further
referencing of installation, operation and service.
3.1 DESCRIPTION OF CONTROLS
1. POWER
Depress to switch power on or off (switch
illuminates when power is on).
2. THERMOSTAT
Temperature range 50 - 320°C (120 - 600°F).
Light illuminates when elements are cycling
ON to maintain set temperature.
1
3. BAKE TIMER
1 Hour bake timer.
(Light illuminates when “time up” (0) reached,
and buzzer sounds).
2
4. ROAST N HOLD
Depress switch to activate ’ROAST N HOLD’
function (Switch illuminates when ON).
5. ROAST TIMER
3 Hour roast timer.
(Light illuminates when “time up” (0) reached,
and product held at 75°C (167°F).
6. STEAM SWITCH
Push switch to activate water injection (Water
injects into oven while the button is
depressed).
3
7. LIGHT SWITCH
Push switch to activate light.
(Light illuminates while button depressed).
4
5
6
7
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EXPLANATION OF CONTROL
SYSTEM
capillary type thermostat which can be set to a
required cooking temperature.
The E32 Turbofan convection oven features
multi-function operator controls for which a
correct understanding of their operation is
required before carrying out any service or
fault repair work. The control device functions
are explained as follows:
The thermostat switch has a separate switch
body assembled onto the front from the shaft
assembly and when the thermostat is set to a
cooking temperature, the switch contacts turn
on the oven fan. The switch is closed (fan on)
whenever the thermostat is not in the Off
(vertical) position. The control panel indicator
light above the thermostat knob cycles On
and Off with the thermostat to indicate when
the elements are on and the oven is heating.
3.2
A power switch on the control panel isolates
all to the controls of the oven. With the power
switch Off all functions of the oven are
inoperable.
The E32 Turbofan convection oven has 6.5
kW of electric heating elements, comprising of
a 3 kW inner coil, and a 3.5 kW outer coil,
both of which make up the element assembly
around the oven fan. The elements are
switched on and off by the main oven
thermostat or hold thermostat via a four-pole
25 Amp contactor located inside the control
housing. Only two poles of the contactor are
used, one for each element coil.
With the power switch On (illuminated) power
is directly supplied to the 60 minute bake
timer, steam (water injection) switch, door
microswitch, light switch, and the temperature
control circuit. The oven circulation fan will
operate only when the thermostat is turned
on. The control panel light switch will turn the
oven lights on when the door is closed only
when the light switch is held in. The oven
lights will come on automatically when the
door is open, as this is controlled by the door
microswitch.
The E32 Turbofan convection oven features a
Roast-and-Hold system which can be used to
automatically set the oven to a fixed holding
temperature at the end of a timed cooking
period. When the Roast-and-Hold switch is
turned On the switch will illuminate and switch
on a relay found inside the control panel, at
the base of the control housing next to the
door microswitch. When the relay is switched
ON a normally closed switch pole on the relay
is opened and the normal power supply to the
oven thermostat is isolated.
A second
normally open switch pole is closed and this
provides power to the 3 hour roast timer.
The 60 minute timer is a mechanical timer and
can therefore be operated with the oven’s
power switch On or Off. However, only with
the oven’s power switch On will the switch
contacts of the 60 minute timer turn on the
time-up buzzer and illuminate the time-up
indicator on the control panel. The buzzer
and time-up indicator provide indication that
the time setting has run down to zero and at
this point will remain On continuously until the
60 minute timer has been manually set back
to the Off (vertical) position. The 60 minute
timer does not control any other part of the
oven’s operating system as this timer is
independent of the temperature control and
heating system.
If the roast timer is in the Hold (vertical)
position the timer switch contacts will be in
their normally closed position and supply
power directly to the Hold thermostat located
behind the control panel.
The Hold
thermostat is factory set to 75°C (167°F) and
will supply power to the heating elements
through the heating contactor as required to
maintain its preset temperature.
The steam (water injection) switch on the
control panel can be operated whenever the
power switch is On. The switch is momentary
like the light switch and when depressed, will
operate the electric solenoid valve at the rear
of the oven and inject water across the
elements and fan from the flat spray (vertical)
nozzle positioned at the rear of the oven
elements. Releasing the steam button will
close the solenoid valve. This feature is used
to instantaneously add steam into the oven.
The thermostat heating light will also cycle
On/Off as the Hold thermostat maintains
temperature.
In the Roast-and Hold mode the 3 hour timer
can be set to a selected roasting time. During
this time period the normally open switch
contacts of the timer are closed. The timer
has two change over switches and in this
The temperature control of this oven is with a
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position one is used to supply power to its
timing motor and the other is used to switch
power directly to the main oven thermostat.
During the 3 hour timer run-down period the
oven temperature will be controlled by the
main oven thermostat to the set temperature
and operate as previously described.
When the 3 hour timer has run down and
reached the Hold position the two switch
contacts change over to their normally closed
position which isolates power from the timer
motor and the oven thermostat.
It also
switches power back to the oven hold
thermostat. At this point the temperature
control is now maintained by the hold
thermostat as previously described.
To
cancel the hold circuit the Roast-and-Hold
switch is turned Off. This turns off the
contactor which removes power from the 3
hour timer and closes the contactor pole on
the contactor that feeds the main oven
thermostat. The Hold indicator light above the
3 Hour timer will illuminate whenever the oven
is operating in hold mode (Roast ‘n Hold selected, and 3 Hour timer at zero position).
The factory preset hold thermostat can be
adjusted as required to change the holding
temperature if necessary.
Refer Service
section for this procedure.
The following Troubleshooting Guide should
be used to identify any incorrect oven
operation. On correct identification of the
operating fault the Troubleshooting Guide will
make reference to the corrective action
required, or refer to the Fault Diagnosis
section and/or Service section to assist in
correction of the fault.
Revision 1/F3508
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4. MAINTENANCE
WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED
OUT BY QUALIFIED PERSONS ONLY.
4.1 CLEANING
washed in the sink, but take care not to cut
or damage them. To replace, ensure that
the lip is facing the oven opening. Fit the
top and bottom seals first, then the side
seals.
WARNING: ALWAYS TURN THE
POWER SUPPLY OFF BEFORE
CLEANING.
OVEN DOOR GLASS
Clean with conventional glass cleaners.
IMPORTANT: THIS UNIT IS NOT
WATER PROOF.
DO NOT USE A WATER JET SPRAY TO
CLEAN INTERIOR OR EXTERIOR OF
THIS UNIT.
EXTERIOR
Clean with a good quality stainless steel
cleaning compound. Harsh abrasive cleaners
may damage the surface.
INTERIOR
Ensure that the oven chamber is cool. Do not
use wire brushes, steel wool or other abrasive
materials. Clean the oven regularly with a
good quality oven cleaner. Take care not to
damage the fan or the tube at the right side of
the oven which controls the thermostat.
OVEN RACKS
To remove, slide out to the stop position, raise
the front edge up, and lift out.
SIDE RACKS
To remove, lift front top to disengage and
slide rack forward. To replace, slide top rear
slot in rack onto rear stud, then engage front
keyhole on front stud.
LAMP GLASS
To remove glasses, unscrew anti-clockwise.
To replace, screw in clockwise.
IMPORTANT:
DO NOT
TIGHTEN LAMP GLASS.
OVER
OVEN SEALS
To remove, hold at their centre point and pull
forward until they unclip. Remove side seals
first, then top and bottom. The seals may be
Revision 1/F3508
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4.2 ROUTINE PROCEDURES
PROCEDURE
INTERVAL
DOOR SEALS
Check for deterioration.
12 months
DOOR PIVOT BUSHES
Check for wear.
12 months
DOOR CATCH
Ensure that catch is adjusted such that the door closes 12 months
properly.
ELEMENT
Check that element resistance is correct to it’s rating 12 months
(refer 6.3.15).
WATER NOZZLE
Check for liming in water nozzle.
Revision 1/F3508
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12 months
5. TROUBLE SHOOTING
WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED
OUT BY QUALIFIED PERSONS ONLY.
FAULT
THE OVEN DOES NOT
OPERATE / START
POSSIBLE CAUSE
REMEDY
The mains isolating switch on
Turn on.
the wall, circuit breaker or fuses
are “off” at the power board.
The power switch on the oven is Depress switch. Switch will
off.
illuminate.
FAN DOESN’T OPERATE
Incorrect electrical supply.
(Refer fault diagnosis 6.1.1)
Ensure electrical supply correct.
Power switch on unit faulty.
(Refer fault diagnosis 6.1.1)
Replace.
(Refer service section 6.3.4)
Thermostat not on.
(Fan only operates when the
thermostat is on).
Turn thermostat on.
Thermostat fan switch faulty.
(Refer fault diagnosis 6.1.2)
Replace thermostat.
(Refer service section 6.3.9)
Fan motor faulty.
(Refer fault diagnosis 6.1.2)
Replace.
(Refer service section 6.3.17)
Wiring.
Check and tighten any loose
wiring.
OVEN LIGHT NOT
Blown bulb.
ILLUMINATING - DOOR OPEN
(AUTOMATICALLY ON)
No power to light.
(Refer fault diagnosis 6.1.3)
Replace.
(Refer service section 6.3.1)
Correct fault.
OVEN LIGHT NOT
ILLUMINATING - DOOR
CLOSED
(MANUALLY SWITCHED ON)
Blown bulb.
Replace.
(Refer service section 6.3.1)
Light switch faulty.
(Refer fault diagnosis 6.1.4)
Replace.
(Refer service section 6.3.4)
NO WATER INJECTION /
STEAM
Water not turned on.
Turn water on at water supply.
Oven water nozzle blocked.
Remove, clean or replace.
(Refer service section 6.3.14)
Fault with water valve.
(Refer fault diagnosis 6.1.5)
Service or replace as required.
(Refer service section 6.3.12,
6.3.13)
Steam switch faulty.
Replace.
(Refer service section 6.3.4)
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FAULT
CONTINUOUS WATER OUT
OF OVEN WATER NOZZLE
POSSIBLE CAUSE
REMEDY
With oven on only—Electrical
fault.
(Refer fault diagnosis 6.1.6)
Correct electrical fault.
With oven on or off—Fault with
water valve.
(Refer fault diagnosis 6.1.5)
Service or replace as required.
(Refer service section 6.3.12,
6.3.13)
60 MINUTE TIMER WILL NOT
TIME DOWN
Timer faulty.
Replace.
(Refer service section 6.3.7)
60 MINUTE TIMER
INACCURATE BELOW 20
MINUTES
Timer not set correctly.
For timer settings below 20
minutes, always rotate past 20
minutes, then back to desired
time.
Zero (time up) position not set
correctly.
(Refer service section 6.4.6)
Buzzer faulty.
(Refer fault diagnosis 6.1.7)
Replace.
(Refer service section 6.3.5)
Timer not switching on buzzer.
(Refer fault diagnosis 6.1.7)
Replace.
(Refer service section 6.3.7)
60 MINUTE TIMER NO TIME
UP INDICATOR
Indicator faulty.
(Refer fault diagnosis 6.1.8)
Replace.
(Refer service section 6.3.3)
NO HEAT
No power to thermostat.
(Refer fault diagnosis 6.1.9)
Identify fault and correct.
Thermostat faulty.
(Refer fault diagnosis 6.1.9)
Replace.
(Refer service section 6.3.9)
Heating contactor faulty.
(Refer fault diagnosis 6.1.9)
Replace.
(Refer service section 6.3.11)
Element faulty (blown).
(Refer fault diagnosis 6.1.9)
Replace.
(Refer service section 6.3.15)
Heating contactor faulty.
(Refer fault diagnosis 6.1.9)
Replace.
(Refer service section 6.3.11)
Thermostat faulty.
(Refer fault diagnosis 6.1.10)
Replace.
(Refer service section 6.3.9)
Oven in ‘Roast ‘n Hold’ mode.
Switch off ‘Roast ‘n Hold’.
Overloading of oven.
Reduce oven loading.
Electrical supply incorrect.
Check supply voltage is as per
rating plate voltage.
Fan not working.
Check fan operation.
Thermostat out of calibration.
(Refer fault diagnosis 6.1.11)
Correct calibration.
(Refer service section 6.4.1)
Element not working.
Correct element fault.
(Refer Fault: No Heat)
60 MINUTE TIMER NO TIME
UP BUZZER
NO TEMPERATURE
CONTROL (TEMPERATURE
OVERRUN)
SLOW RECOVERY
Revision 1/F3508
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FAULT
POSSIBLE CAUSE
REMEDY
ELEMENT NOT WORKING
Element faulty (blown).
(Refer fault diagnosis 6.1.9)
Replace.
(Refer service section 6.3.15)
NO THERMOSTAT HEATING
INDICATOR
Indicator faulty.
(Refer fault diagnosis 6.1.12)
Replace.
(Refer service section 6.3.3)
ROAST TIMER (180 MINUTE)
WILL NOT TIME DOWN
Roast ’n’ Hold switch not depressed.
Depress switch. Switch will
illuminate.
No power to timer / timer faulty.. Correct electrical fault / replace
(Refer fault diagnosis 6.1.13) timer.
(Refer service section 6.3.8)
NO HOLD INDICATOR
HOLDING TEMPERATURE
INCORRECT
DOOR DOES NOT CLOSE
DOOR SEAL LEAKS
Revision 1/F3508
‘Roast ‘n Hold’ switch faulty.
(Refer fault diagnosis 6.1.13)
Replace.
(Refer service section 6.3.4)
Faulty indicator.
(Refer fault diagnosis 6.1.14)
Replace.
(Refer service section 6.3.3)
Faulty timer.
(Refer fault diagnosis 6.1.14)
Replace.
(Refer service section 6.3.8)
Hold thermostat set temperature incorrect.
Adjust to correct temperature.
(Refer service section 6.4.5)
Hold thermostat faulty.
(Refer fault diagnosis 6.1.15)
Replace.
(Refer service section 6.3.10)
Tray in way of door.
Correctly position tray in rack.
Door seal obstruction.
Correctly install door seal.
(Refer service section 6.3.20)
Door handle installed
incorrectly.
Fit correctly.
(Refer installation section)
Door catch setting incorrect.
Adjust.
(Refer service section 6.4.3)
Door pivot bushes / pins worn.
Replace.
(Refer service section 6.3.21)
Door seal damaged.
Replace.
(Refer service section 6.3.20)
Door seal incorrectly fitted.
Correctly install door seal.
(Refer service section 6.3.20)
Door catch setting incorrect.
Adjust.
(Refer service section 6.4.3)
Door pivot bushes / pins worn.
Replace.
(Refer service section 6.3.21)
Door catch striker plate worn.
Replace.
(Refer installation instructions—Door handle installation)
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6. SERVICE PROCEDURES
WARNING: ENSURE POWER SUPPLY IS SWITCHED OFF BEFORE SERVICING.
WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED
OUT BY QUALIFIED PERSONS ONLY.
SECTION
6.1
FAULT DIAGNOSIS.............................................................................................................. 20
6.1.1
6.1.2
6.1.3
6.1.4
6.1.5
6.1.6
6.1.7
6.1.8
6.1.9
6.1.10
6.1.11
6.1.12
6.1.13
6.1.14
6.1.15
6.2
Oven Does Not Operate / Start ........................................................................... 20
Fan Does Not Operate ........................................................................................ 20
Oven Light Not Illuminating—Door Open ............................................................ 20
Oven Light Not Illuminating—Door Closed ......................................................... 20
No Water Injection / Steam ................................................................................. 20
Continuous Water Out Of Oven Water Nozzle.................................................... 21
60 Minute Timer No Time Up Buzzer .................................................................. 21
60 Minute Timer No Time Up Indicator ............................................................... 21
No Heat ............................................................................................................... 21
No Temperature Control (Temperature Overrun) ............................................... 22
Slow Recovery..................................................................................................... 22
No Thermostat Heating Indicator ........................................................................ 22
Roast Timer (180 Minute) Will Not Time Down ................................................... 22
No Hold Indicator ................................................................................................. 23
Holding Temperature Incorrect............................................................................ 23
ACCESS ................................................................................................................................ 24
6.2.1
6.2.2
6.2.3
6.2.4
6.3
PAGE NO.
Control Panel ....................................................................................................... 24
Service Panel (Side Panel).................................................................................. 24
Service Panel (Rear Panels) ............................................................................... 24
Control Panel (Rear)............................................................................................ 24
REPLACEMENT ................................................................................................................... 25
6.3.1
6.3.2
6.3.3
6.3.4
6.3.5
6.3.6
6.3.7
6.3.8
6.3.9
6.3.10
6.3.11
6.3.12
6.3.13
6.3.14
6.3.15
6.3.16
6.3.17
6.3.18
6.3.19
Revision 1/F3508
Light Bulb / Glass ................................................................................................ 25
Door Microswitch ................................................................................................. 25
Indicator Neon Light ............................................................................................ 25
Power / Roast / Lights / Water Switches ............................................................. 25
Buzzer .................................................................................................................. 25
Hold Relay ........................................................................................................... 26
Bake Timer .......................................................................................................... 26
Roast Timer ......................................................................................................... 26
Thermostat........................................................................................................... 26
Hold Thermostat .................................................................................................. 27
Heating Contactor ................................................................................................ 27
Water Solenoid .................................................................................................... 28
Water Solenoid Cleaning ..................................................................................... 28
Spray Nozzle ....................................................................................................... 28
Elements .............................................................................................................. 28
Fan....................................................................................................................... 29
Motor .................................................................................................................... 29
Outer Glass ......................................................................................................... 29
Inner Glass .......................................................................................................... 30
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6.3.20
6.3.21
6.3.22
6.3.23
6.4
Door Seals ........................................................................................................... 30
Door Pivot Bushes ............................................................................................... 30
Stainless Steel Door—Outer Glass ..................................................................... 31
Stainless Steel Door—Inner Glass ...................................................................... 31
ADJUSTMENT / CALIBRATION .......................................................................................... 32
6.4.1
6.4.2
6.4.3
6.4.4
6.4.5
6.4.6
Revision 1/F3508
Thermostat Calibration ........................................................................................ 32
Door Microswitch Adjustment .............................................................................. 33
Door Catch Adjustment ....................................................................................... 33
Door Alignment .................................................................................................... 33
Hold Temperature Adjustment ............................................................................ 33
60 Minute Timer Zero Position Adjustment ......................................................... 33
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6.1 FAULT DIAGNOSIS
Replace if faulty.
6.1.1 OVEN DOES NOT OPERATE / START
If there is no voltage, open oven door and
manually depress door microswitch actuator
at bottom right of oven. If this activates the
lights, then the microswitch actuator arm
behind the control panel requires adjustment.
Incorrect electrical supply
Check that the voltage across phase and
neutral (L1 and L2) terminals of terminal block
is the voltage as stated on the unit’s electrical
rating plate.
Check voltage across micro-switch terminals
to neutral.
With the door open there should be power to
the com terminal and the n.c. terminal.
If incorrect, check electrical connection of
supply wiring and / or check electrical supply.
If not, microswitch is faulty—replace.
n.c.
Power switch faulty
Check if power switch latches. If the switch
does not latch, then switch is faulty—replace.
Microswitch
With switch latched, check voltage across
terminal one to terminal three or four. If there
is no voltage, check for fault in wiring.
Check voltage across terminal two to terminal
three or four. If there is no voltage, then
switch is faulty—replace.
NOTE:
com
Figure 6.1.1
6.1.4 OVEN LIGHTS NOT ILLUMINATING—
DOOR CLOSED (MANUALLY SWITCHED
ON)
When power switch is latched, it
should illuminate if operating correctly.
Light switch faulty
6.1.2 FAN DOESN’T OPERATE
Check voltage to the bottom terminal of the
switch. If there is no voltage, then check
wiring.
Fan motor faulty
Check the supply voltage across motor terminals. If there is no voltage then check the
electrical connections of supply wiring.
With switch depressed, check voltage at top
terminal. If there is no voltage, then replace
the switch.
If voltage is correct then check the oven fan
for free rotation. Remove any obstruction.
If voltage is correct, then check wiring to light.
If fan is free to spin and the voltage supply is
correct, then the motor is faulty—replace.
NOTE: Alternately, perform a continuity test
across the terminals with the light
switch depressed.
Fan switch faulty
6.1.5 NO WATER INJECTION / STEAM
Check that the thermostat has power to terminal 5 on switch body on the front of the thermostat when power switch is ON. If no voltage check wiring. Check that terminal P5 has
power switched to it when the thermostat is
turned on. If no power to terminal P5 switch is
faulty and thermostat c/w switch needs to be
replaced.
Fault with water valve
Check voltage supply across the water valve
solenoid coil with the steam switch depressed.
If there is no power supply then check the
control panel steam switch.
Check voltage to the bottom terminal of the
switch. If there is no voltage, then check
wiring.
6.1.3 OVEN LIGHTS NOT ILLUMINATING—
DOOR OPEN (AUTOMATICALLY ON)
With switch depressed, check for voltage at
top terminal. If there is no voltage then
replace switch. If voltage correct, check wiring to solenoid coil.
No power to lights
Check the supply voltage across lamp housing terminals at RH side rear of oven. If the
voltage is correct, replace the bulb (if faulty).
If the bulb is OK, check lamp housing.
Revision 1/F3508
If power supply to the coil is correct,
disconnect wiring to coil and check the
resistance of the coil windings.
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Correct coil resistance: 3650 ohms
6.1.8 60 MINUTE TIMER NO TIME UP
INDICATOR
NOTE: If open circuit / high resistance, then
the coil is faulty—replace.
Indicator faulty
If coil resistance is correct, rewire and listen
for an audible solenoid click when the steam
switch is depressed.
With the timer in the zero position, check for
voltage across the indicator light. If correct,
then the indicator light is faulty—replace.
If solenoid can be heard functioning, and oven
water nozzle is not blocked, then remove
water solenoid and fittings and check for
blockages.
If there is no voltage then check wiring.
6.1.9 NO HEAT
No power to thermostat
6.1.6 CONTINUOUS WATER OUT OF OVEN
WATER NOZZLE
Check voltage to terminal 2 on oven
thermostat. If there is no voltage then check
voltage through terminal 5 and one on hold
relay (behind control panel). If there is no
voltage to terminal 5 then check wiring. If
there is no voltage to terminal 1 then check
that the hold relay has no power at relay coil
terminal 7. If relay coil is not energised (ie no
power at 7) and no power out of terminal 1,
then the relay is faulty—replace.
Water solenoid electrical fault
With control panel steam switch not
depressed, check for power supply across
solenoid coil. If there is power to the coil, then
check wiring and steam switch (refer 6.1.5).
6.1.7 60 MINUTE TIMER NO TIME UP
BUZZER
7
Buzzer faulty
5
With timer in ‘zero’ position, check the buzzer
at side of control panel (inside) for voltage
across terminals. If voltage is correct then
buzzer is faulty—replace.
3
8
1
4
If there is no voltage, then check wiring.
Relay
Buzzer
Figure 6.1.3
If relay is energised (ie power at 7) then
’Roast n Hold’ switch is on and unit is in hold
mode. Turn off ’Roast n Hold’ and recheck
operation.
Buzzer Terminals
Figure 6.1.2
NOTE: There should be no voltage across
these terminals when ‘Roast ‘n Hold’ is not
selected.
Timer not switching on buzzer
With timer in zero position, check voltage to
top connection (terminal one) and bottom
connection (terminal two) of timer. If there is
no voltage at terminal one then check wiring.
Thermostat faulty
Set thermostat to 200°C or 400°F. Check the
voltage out of terminal 1 on the thermostat. If
there is no voltage then the thermostat is
faulty—replace.
If no voltage at terminal two then timer is
faulty—replace.
If the voltage is correct and the heating light is
on then check all wiring to heating contactor.
NOTE: Timer will continue to run
approximately three minutes below zero.
Buzzer and time up indicator will continue until
the timer is manually switched off (to vertical
position).
Heating contactor faulty
With thermostat on, check that the heating
contactor coil has power to terminal A1 and
voltage across the coil, terminals A1 and A2.
If incorrect check wiring.
If voltage is correct, check that contactor pulls
in and closes the contacts when power to con-
Revision 1/F3508
-21-
tactor coil is on. Correct operation will make
an audible noise when closing contacts and
on the front face of the contactor the contact
mechanism will visibly pull in. If not, contactor
is faulty—replace.
heating indicator should be off. If not then the
thermostat is faulty—replace.
If contactor operates correctly, check continuity through the poles of the contactor when
closed. If no continuity through connected
poles then contacts are blown and contactor
requires replacing.
Thermostat out of calibration
Terminal A1
Terminal A2
Terminal 1
Terminal 3
Terminal 2
Terminal 4
6.1.11 SLOW RECOVERY
Place an accurate digital thermometer probe
in centre of oven. Set thermostat to 180°C or
355°F. Close the oven door and allow oven
thermostat to cycle on and off twice. Record
oven centre temperature for the next
thermostat on and off cycle. The thermostat
should cycle on and off between 165°C and
195°C or 330°F and 385°F when set to the
above temperature. If oven temperature is
outside these ranges, then the thermostat
requires recalibration.
NOTE: Thermostat cycling span should be
±15°C or 27°F
6.1.12 NO THERMOSTAT HEATING
INDICATOR
Figure 6.1.4
For checking elements where temperature
overrun is occurring, check that contactor releases (opens) when thermostat is switched
OFF. If not, contacts of the contactor have
welded shut and elements will be ON and
heating will be continuous.
Contactor is
faulty—replace.
Indicator faulty
Check the voltage across the indicator terminals. If the voltage is correct then the indicator is faulty—replace.
If there is no voltage then check wiring.
6.1.13 ROAST TIMER (180 MINUTE) WILL
NOT TIME DOWN
Element faulty (blown)
With the thermostat on and heating check
voltage across element terminals at RH side
of oven. If the voltage is correct then check
the current draw of element. If there is no current draw then element is faulty—replace.
No power to timer
Check the voltage at terminal 5 on underside
of the 180 minute timer.
If there is no voltage then check voltage is being supplied to each element coil from the
heating contactor. If no voltage to elements,
check contactor operation (refer 6.1.9) and
wiring.
Check that one lead of timer motor is connected to terminal five of timer and the other
lead is connected to neutral of ‘Roast ’n Hold’
switch.
If voltage at terminal 5 is correct and wiring is
correct then the timer motor is faulty—replace
timer.
NOTE: Correct element current draw:
208 V : Inner Coil 12.9A ± 2.5%
Outer Coil 15.0A ± 2.5%
220 V : Inner Coil 13.6A ± 2.5%
Outer Coil 15.9A ± 2.5%
240 V : Inner Coil 12.5A ± 2.5%
Outer Coil 14.6A ± 2.5%
If there is no power at terminal 5, check for
power supply at terminal 4 of timer. If there is
voltage at terminal 4 and not at terminal 6 with
timer set, then timer switch is faulty—replace
timer.
6.1.10 NO TEMPERATURE CONTROL
(TEMPERATURE OVERRUN)
Heating contactor faulty
Terminal 4
Refer 6.1.9
Terminal 1
Thermostat faulty
Terminal 2
Terminal 6
Terminal 3
Terminal 5
With thermostat in off (vertical) position, the
Figure 6.1.5
Revision 1/F3508
-22-
If terminal 4 voltage is correct, check relay at
the base of the control housing behind control
panel is latched ON. If relay is ON then check
wiring.
If relay is not latched ON when ‘Roast ‘n Hold’
switch illuminated then check the voltage
across terminals 7 and 8 of relay coil (fig
6.1.3). If the voltage is correct but the relay is
in the off position then the relay is faulty—
replace.
If there is no voltage across 7 and 8 then
check wiring.
‘Roast ‘n Hold’ switch faulty
Check if the switch latches. If the switch does
not latch then the switch is faulty—replace.
With the switch latched, check voltage across
terminal 1 to terminal 3 or 4. If there is no
voltage then check for fault in wiring.
Check voltage across terminal 2 to terminal 3
or 4. If there is no voltage then switch is
faulty—replace.
NOTE: When the switch is latched, it should
illuminate if operating correctly.
6.1.14 NO HOLD INDICATOR
Indicator faulty
Check the voltage across the indicator terminals. If the voltage is correct then the indicator is faulty—replace.
If there is no voltage then check wiring.
Timer faulty
NOTE: Timer in ‘HOLD’ position (vertical) and
‘Roast n Hold’ switch on (illuminated).
Check the voltage at terminal three of timer,
with timer in hold position. If the voltage is
correct then check wiring.
If there is no voltage then check voltage at terminal one of timer. If there is voltage at terminal one, but no voltage at terminal three with
timer in hold position then timer switch is
faulty—replace.
6.1.15 HOLDING TEMPERATURE
INCORRECT
Hold thermostat faulty
With the power switch on and illuminated,
‘Roast ‘n Hold’ switch on and illuminated, and
the roast (180 minute) timer set to hold, check
that the hold indicator is illuminated.
With a cold oven (ie room temperature) check
that the oven element is heating. Test the
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-23-
6.2 ACCESS
6.2.1 CONTROL PANEL
1) Undo the two screws on top of control
panel.
Six Screws
Two Screws
Figure 6.2.3
6.2.4 CONTROL PANEL—REAR
Figure 6.2.1
2) Panel is now free to hinge at bottom.
When closing the panel ensure wires and
capillary tube are clear of metal or other
terminals.
Power Switch
Heating Indicator
Thermostat
6.2.2 SERVICE (SIDE) PANEL
Buzzer
1) Undo the two screws holding the panel.
Bake Time Up
Indicator
Bake Timer
Hold Thermostat
Roast‘n Hold Switch
Roast ‘n Hold Time
Up Indicator
Roast Timer
Two Screws
Figure 6.2.2
Steam Switch
2) Remove panel.
Light Switch
6.2.3 SERVICE (REAR) PANELS
1) Undo the six screws holding the panels.
Figure 6.2.4
2) Remove panels.
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6.3 REPLACEMENT
Neon
Wires
6.3.1 LIGHT BULB / GLASS
1) Unscrew lamp cover(s).
Lamp
Covers
Figure 6.3.3
2) From back push neon through front of
panel rotating clockwise.
3) Push new neon in from front of panel, and
reconnect wires.
Figure 6.3.1
6.3.4 POWER / ROAST / LIGHTS / STEAM
SWITCHES
2) Unscrew bulb out of fitting.
3) Screw in replacement bulb.
1) With control panel open (refer 6.2.1) remove the wires from the back of the
switch, noting their positions.
4) Ensure seal fitted. Screw lamp cover into
holder with baffle fitted (do not over
tighten).
6.3.2 DOOR MICROSWITCH
Switch
Wires
1) Hinge down control panel (refer 6.2.1)
2) Remove two screws holding microswitch
to bracket.
Figure 6.3.4
2) From back push switch through front of
panel.
3) Push new switch in from front of panel,
and reconnect wires.
Two Screws
6.3.5 BUZZER
1) Remove control panel (refer 6.2.1).
Figure 6.3.2
2) Remove two screws
bracket to panel.
3) Transfer wires to new switch and reassemble.
holding
buzzer
4) Adjust micro-switch (refer 6.4.2).
Two Screws
6.3.3 INDICATOR NEON LIGHT
1) With control panel open (refer 6.2.1) remove the wires from the back of the neon.
Figure 6.3.5
Revision 1/F3508
-25-
3) Withdraw and remove two screws holding
buzzer to bracket.
3) Transfer wires to new timer.
4) Withdraw old timer and insert new timer,
securing with screws.
5) Replace knob.
Two
Screws
6.3.8 ROAST TIMER
1) Remove roast timer knob by pulling it
firmly away from control panel.
2) Open control panel (refer 6.2.1) and undo
two screws securing timer.
Figure 6.3.6
4) Transfer wires to new buzzer.
5) Reassemble in reverse order.
6.3.6 HOLD RELAY
Two Screws
1) Open control panel (refer 6.2.1).
2) Remove two screws securing relay to
control panel.
Figure 6.3.9
3) Transfer wires to new timer.
4) Withdraw old timer and insert new timer,
securing with screws.
5) Replace knob.
6.3.9 THERMOSTAT
1) Pull knob off front of thermostat
Two Screws
2) Open control panel (refer 6.2.1) and undo
two screws securing thermostat.
Figure 6.3.7
3) Withdraw and transfer wires to new relay.
4) Reassemble in reverse order.
6.3.7 BAKE TIMER
Two Screws
1) Remove bake timer knob by pulling it
firmly away from control panel.
2) Open control panel (refer 6.2.1) and undo
two screws securing timer.
Two Screws
Figure 6.3.10
3) Transfer wires to new thermostat.
4) Open oven door, remove racks and fan
baffle rack. Loosen two screws securing
thermostat phial bracket.
Figure 6.3.8
Revision 1/F3508
-26-
Two Screws
Two Screws
Figure 6.3.11
Figure 6.3.14
5) Withdraw old thermostat phial through
side of oven.
Note position in phial
bracket.
6) Remove fibreglass sleeving from old
thermostat and fit to replacement
thermosat.
2) Transfer wires to new thermostat.
3) Open oven door, remove racks and fan
baffle rack.
Loosen thermostat phial
bracket
Fibreglass Sleeve
Two Screws
Thermostat Phial
Figure 6.3.15
7) Insert new thermostat.
4) Withdraw old thermostat phial through
side of oven.
Note position in phial
bracket
8) Re-assemble in reverse order.
5) Insert new thermostat.
NOTE: Ensure that the thermostat phials are
located in their correct positions. The
main thermostat probe must be on the
side closest to the door. The hold thermostat must be on the side closest to the fan
and elements.
6) Re-assemble in reverse order.
Figure 6.3.12
NOTE: Ensure that the thermostat phials are
located in their correct positions. The
main thermostat probe must be on the
side closest to the door. The hold thermostat must be on the side closest to the fan
and elements (refer figure 6.3.13).
6.3.11 HEATING CONTACTOR
Control thermostat
phial
Hold thermostat
phial
NOTE: For models using earlier relays and
contactors (not shown) refer to appendix.
1) Open control panel (refer 6.2.1) and undo
two screws securing heating contactor
bracket to oven.
Towards
the
door
Two Screws
Figure 6.3.13
6.3.10 HOLD THERMOSTAT
1) Open control panel (refer 6.2.1) and undo
two screws securing hold thermostat
bracket.
Figure 6.3.16
Revision 1/F3508
-27-
2) Unclip contactor from bracket.
6.3.13 WATER SOLENOID CLEANING
1) Disconnect water supply from the water
solenoid.
2) Remove the sieve from the valve assembly by pulling firmly away from the assembly with a pair of pliers.
Clip
Figure 6.3.17
Sieve
3) Clip new contactor onto bracket.
4) Secure new heating contactor and bracket
to oven with two screws.
Figure 6.3.19
5) Transfer wires from old contactor to new
contactor, ensuring all wires are in their
correct positions.
4) Clean the sieve, removing all dirt and
grime.
5) Replace the sieve and reconnect the water supply.
6.3.12 WATER SOLENOID
1) Ensure water supply is turned off.
6.3.14 SPRAY NOZZLE
2) To access the solenoid, remove the rear
access panel (refer 6.2.3)
1) Inside the oven remove the RH side fan
baffle, then unscrew the spray nozzle.
3) To remove or replace solenoid, disconnect water solenoid from oven water tube
behind water solenoid with a 1/2” (13mm)
spanner.
4) Remove water solenoid from oven by
removing two screws securing the water
solenoid bracket to electrical supply
junction box.
Spray Nozzle
Two Screws
Figure 6.3.20
2) Clean or replace as required, ensuring
debris free on re-assembly.
3) Ensure that the spray nozzle is installed in
the vertical position.
6.3.15 ELEMENTS
Figure 6.3.18
5) Carefully withdraw solenoid (including
wires and bracket).
1) Remove service panel (refer 6.2.2) and
baffle.
5) Replace or service solenoid as required.
2) Rremove the wires from the elements.
6) To reinstall, reverse procedure.
7) Check water connections do not leak.
8) Check for correct water injection operation.
Revision 1/F3508
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2) Replace and re-assemble in reverse
order.
6.3.17 MOTOR
1) Remove fan (refer 6.2.16) and then
remove the wires that go to the motor.
Element
Wires
2) Undo the three screws holding the motor
in place (from the outside) and remove
motor.
Figure 6.3.21
2) Unscrew the elements from inside the
oven.
60 Hz
Terminal
Neutral
50 Hz
Terminal
Screws (3)
Earth /
Ground
Element Screw
Figure 6.3.24
3) Replace and re-assemble in reverse
order.
Figure 6.3.22
4) Ensure wire connections are correct to the
voltage supply—60 Hz / 50 Hz (fig 6.3.24)
3) Pull elements carefully to remove. Silicone sealant may require effort to remove
elements.
4) Replace and re-assemble in reverse
order. Use high temperature (232°C /
450°F minimum) RTV silicone sealant to
seal element against side wall of oven.
6.3.18 OUTER GLASS
1) Open door
Element Rating:
208-220 V
230-240 V
Inner Element
17.0 ohms
Outer Element
14.1 ohms
Inner Element
19.4 ohms
Outer Element
17.0 ohms
2) Loosen the two screws securing the top
pivot whilst supporting the door. The pivot
can now be lifted, and the door removed
from the oven.
6.3.16 FAN
Two Screws
1) With baffle removed undo the centre nut.
NOTE:
loosen.
LH thread - Turn clockwise to
Figure 6.3.25
3) Remove screws securing door handle,
and remove handle from the door assembly.
Centre Nut
Figure 6.3.23
Revision 1/F3508
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2) To replace, ensure the silicone rubber
seal has not been displaced. Clean the
glass and refit it. Place the window
spacer in position and crimp the retaining
lugs over to hold the glass in place. Refit
outer glass as above.
Screws
6.3.20 DOOR SEALS
1) Open oven door.
Figure 6.3.26
2) To remove, hold at their centre point and
pull forward until they unclip
4) Remove two screws in top trim and two
screws in bottom trim of door, and remove
trim panels.
Two
Screws
Two Screws
Door Seals
Figure 6.3.29
Figure 6.3.27
5) Lift outer glass away from door.
3) Refit new seals.
6) To replace, ensure that the two silicone
rubber seals are in place on the left hand
and right hand side of the door frame.
Clean the inside of the glass and refit it,
ensuring that the silicone rubber seals
cover the outer edges of the glass. Refit
the trim panels.
Note: Fit top and bottom seals first, with
open side of seal facing downwards. Fit side seals with open
side facing outwards.
6.3.21 DOOR PIVOT BUSHES
6.3.19 INNER GLASS
1) Remove door as per steps one and two of
section 6.3.18.
1) Remove the outer glass (refer 6.3.18).
Uncrimp the retaining lugs of the window
spacer and remove the spacer and glass.
2) Remove the top and bottom pivot brackets
(two screws).
Retaining
Lugs
Two Screws
Figure 6.3.28
Figure 6.3.30
Revision 1/F3508
-30-
3) Door bushes can now be removed and
replaced.
6.3.23 STAINLESS STEEL DOOR
- INNER GLASS
1) Remove the outer glass (refer 6.3.22).
2) Uncrimp the retaining angles and remove
inner glass.
Door Pivot
Bush
Figure 6.3.31
4) Reinstall door by reversing steps one to
two of section 6.3.18.
Retaining
Angles
6.3.22 STAINLESS STEEL DOOR
- OUTER GLASS
1) Remove the door and door handle as per
steps one, two and three of section
6.3.18.
Figure 6.3.34
2) Remove the pivot (two screws), and the
two securing screws from the top and bottom of the door.
3) Replace with new glass and re-assemble
door.
4) Refit door to the oven.
Pivot (Two
Screws)
Two
Screws
Figure 6.3.32
3) Remove the four window screws. The
stainless steel door outer can now be
removed.
Window
Screws (4)
Figure 6.3.33
4) To replace the outer glass, simply remove
and replace, taking care that the outer
seals are positioned correctly around the
glass edge. Reassemble in reverse order.
Revision 1/F3508
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Thermostat
6.4 ADJUSTMENT / CALIBRATION
6.4.1 THERMOSTAT CALIBRATION
IMPORTANT:
IF THE OVEN
TEMPERATURE
NEEDS
TO
BE
INCREASED, ENSURE THAT THE
THERMOSTAT IS IN THE ‘OFF’ POSITION
BEFORE CARRYING OUT ADJUSTMENT.
IF OVEN TEMPERATURE NEEDS TO BE
DECREASED, ENSURE THERMOSTAT IS
IN THE ‘MAX’ TEMPERATURE POSITION
BEFORE
CARRYING
OUT
ANY
ADJUSTMENT.
Figure 6.4.3
5) Carefully remove two screws holding fan
switch to thermostat.
HINT: Tape fan switch assembly together
before removal to prevent it from
springing apart.
Calibration Nut
Screws
Thermostat Shaft
Fan Switch
Fan Switch
Figure 6.4.4
7) Adjust the calibration nut located at the
base of the thermostat shaft.
To increase oven temperature, turn
calibration nut anticlockwise.
To decrease oven temperature, turn
calibration nut clockwise.
Adjustment of the calibration nut by 1°
angular will alter oven temperature by
approximately 2°C (3.6°F).
Thermostat
Figure 6.4.1
1) Turn off power.
2) Remove thermostat knob by pulling it
firmly away from control panel.
Calibration Nut
3) Open control panel (refer 6.2.1). Remove
two screws on control panel holding thermostat.
Screws
Figure 6.4.5
8) Reassemble fan switch onto thermostat
and fit assembly back onto control panel.
9) Turn on power and
thermostat calibration.
Figure 6.4.2
4) The thermostat can now be removed.
Revision 1/F3508
recheck
10) Repeat procedure if necessary.
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oven
6.4.2 DOOR MICROSWITCH ADJUSTMENT
1) Open oven door.
2) Open control panel (refer 6.2.1).
3) With fingers, bend actuator arm of
microswitch so that switch operates when
door is in closed position.
Three screws
Figure 6.4.8
2) Adjust hinge position to align door latch
with catch plate on side of door.
Actuator Arm
6.4.5 HOLD TEMPERATURE ADJUSTMENT
1) The hold temperature of the oven can be
adjusted by turning the hold thermostat
dial to the desired hold temperature. This
dial is located inside the control panel.
Figure 6.4.6
6.4.3 DOOR CATCH ADJUSTMENT
Hold Thermostat
Dial
1) Open the control panel (refer 6.2.1).
2) Loosen the four screws securing the
chrome plated bar which carries the door
catches.
Four Screws
Figure 6.4.9
6.4.6 60 MINUTE TIMER ZERO POSITION
ADJUSTMENT
1) Remove 60 minute timer knob by pulling it
firmly away from control panel.
2) Open control panel (refer 6.2.1). Loosen
two screws on control panel holding 60
minute timer.
Figure 6.4.7
3) The door catches can now be adjusted in
or out to ensure that the door seals correctly.
4) Tighten the screws and close the control
panel.
Two Screws
6.4.4 DOOR ALIGNMENT
Figure 6.4.10
1) Loosen the three screws securing the bottom hinge to the oven front.
Revision 1/F3508
3) The timer can now be rotated as required
to ensure that the buzzer sounds at the
zero position.
-33-
7. ELECTRICAL CIRCUIT SCHEMATIC
Revision 1/F3508
-34-
8. ELECTRICAL WIRING DIAGRAM
Revision 1/F3508
-35-
9. SPARE PARTS
PART NO
DESCRIPTION
CONTROLS
021473
011987
020823
020849
011760
011794
021476
011419
021472
021474
015966
021491
018223
003004
003002
003434
013521
Switch - Power
Thermostat
Knob - Thermostat / Bake Timer
Neon Indicator
Bake Timer
Buzzer
Switch - ‘Roast n Hold’
‘Roast n Hold’ Timer
‘Roast n Hold’ Timer Knob
Switch - Steam / Light
Contactor - Elements
Relay - ‘Roast n Hold’
Hold Thermostat
Microswitch
Oven Lamp Glass
Silk Gasket
Oven Lamp - 40W Miniature Edison Screw
MOTOR & ELEMENTS
015360
Element Assembly 208-220V
015363
Element Assembly 230-240V
013431
Fan Motor
015597
Oven Fan
STEAM SYSTEM
020851
Water Solenoid
021057
Spray Nozzle Assembly
021526
Water Inlet Elbow
021527
Washer
DOOR
021520
021517
021468
021460
021443
002340
017905
Oven Door Seal Strip Side
Oven Door Seal Strip Top / Bottom
Handle
Handle Bracket
Door Outer Glass (Full Glass Door)
Door Inner Glass (Full Glass Door)
Door Bush
RACKS
015575
015656
015168
Oven Side Rack LH
Fan Baffle
Oven Rack
STACKING KIT
021543
Double Stacking Kit
Revision 1/F3508
-36-
10. ACCESSORIES
OVEN RACKS (PART NO 15168)
DOUBLE
021543)
STACKING
KIT
(PART
100 MM (FOUR INCH) FOOT OPTION
(PART NO 13048)
25 MM (ONE INCH) FOOT OPTION (PART
NO 13908)
STAINLESS STEEL DOOR OPTION
A25 STAINLESS STEEL STAND
COOKIE KIT—SIX TRAY OPTION (PART
NOS 17156 & 17157)
Revision 1/F3508
-37-
NO
11. PARTS DIAGRAMS
11.1 MAIN ASSEMBLY
Revision 1/F3508
-38-
Pos
Part No.
Description
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
016241
016245
021448
017872
021549
014954
090424
013986
013978
004727
013951
013987
013941
002247
015597
013974
015360
015363
015581
013520
003434
013521
003002
013967
013965
013431
021172
021467
013893
021173
021534
003004
013977
020768
021636
013610
021637
014031
015656
015168
041405
015575
015930
021517
021519
021520
021522
020082
017905
021532
004725
021466
021468
021441
VENT HOOD PLATE
HOOD SPACER
WRAPPER
INSPECTION PANEL
TOP INSULATION PANEL
VENT TUBE
FIBREGLASS - 38mm
REAR VERTICAL
LH INSULATION PLATE
OVEN - ENAMELLED
HINGE PLATE BOTTOM
INSULATOR OVEN
DRAIN TUBE (to 12/98)
DRAIN PLUG (to 12/98)
FAN
PHIAL GUARD
ELEMENT ASSEMBLY 220V
ELEMENT ASSEMBLY 240V
ELEMENT BRACKET
OVEN LIGHT ASSY
SILK GASKET
LAMP - 40W
LIGHT GLASS
SIDE INSULATION PANEL
MOTOR MOUNTING PLATE
MOTOR
HEAT BLOCK PLATE
CATCH PLATE
DOOR SPRING CATCH
FRONT VERTICAL
RELAY
MICROSWITCH
INSULATOR
CONTACTOR
MICROSWITCH BRACKET
DOOR BUSH
MICROSWITCH BUTTON
OVEN BAFFLE STUD
FAN BAFFLE
OVEN RACK
SCREW
SIDE RACK LH
BAFFLE LOCATING BRACKET
HORIZONTAL SEAL ASSEMBLY
HORIZONTAL SEAL - 0.52M
VERTICAL OVEN SEAL ASSEMBLY
VERTICAL SEAL - 0.55M
TOP HINGE ASSEMBLY
BUSH
DOOR TRIM
DOOR INNER ENAMELLED
DOOR HANDLE BRACKET
HANDLE
CONTROL PANEL MOUNTING BRACKET
CONTROL PANEL
BOTTOM HINGE ASSEMBLY
BUSH
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
020083
017905
Revision 1/F3508
-39-
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
002340
090200
004451
021443
090225
013908
013048
013966
015591
021618
021057
021058
020869
020851
021526
021527
021619
015589
014185
002138
002441
018959
Revision 1/F3508
DOOR INNER GLASS
SILICONE EXTRUSION - 1.74M (NOT ILLUSTRATED)
GLASS CLAMP ANGLE PAINTED
DOOR OUTER GLASS
SILICONE EXTRUSION - 1.2M (NOT ILLUSTRATED)
FOOT ASSEMBLY 3/8"
LEG - 4" HI-TEMP PLASTIC (NOT ILLUSTRATED)
BASE PANEL
JUNCTION BOX
WATER SOLENOID BRACKET
SPRAY NOZZLE ASSEMBLY
WATER TUBE W.A
CONNECTOR-3/8"Fx¼" COMPRESSION
SOLENOID
WATER INLET ELBOW
WASHER (NOT ILLUSTRATED)
REAR SERVICE PANEL - TOP
REAR SERVICE PANEL - BOTTOM
MAINS TERMINAL BLOCK
CABLE CLAMP
INSULATOR
CAPACITOR ASSEMBLY (UK ONLY)
-40-
11.2 CONTROL PANEL ASSEMBLY
Pos
Part No.
Description
1
004723
004804
004730
011987
011794
018224
021537
011760
021538
018223
011419
011983
021442
016579
021474
020823
020849
021476
021472
021473
016602
CONTROL PANEL BAKBAR - ENAM °C
CONTROL PANEL BLUE SEAL - ENAM °C
CONTROL PANEL MOFFAT - ENAM °F
THERMOSTAT 50 - 320°C (120-600°F)
BUZZER
HOLD STAT KNOB
HOLD STAT MOUNTING BRACKET (AFFIX 018209 LABEL)
TIMER - 1hr
HOLD STAT BRACKET
HOLD STAT - ADJUSTABLE
3hr TIMER 50Hz
3hr TIMER 60Hz
TIMER MOUNTING PANEL
HINGE
LIGHT/STEAM SWITCH
TIMER KNOBS
PILOT LIGHT
ROAST 'N' HOLD SWITCH
THERMOSTAT KNOB
SWITCH - POWER
RETAINING STRAP
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Revision 1/F3508
-41-
11. SERVICE CONTACTS
AUSTRALIA
VICTORIA
HEAD OFFICE AND MAIN WAREHOUSE
740 Springvale Road
Mulgrave VIC 3170
Spare Parts Department
NEW SOUTH WALES
Unit 8/142 James Ruse Drive
Rosehill NSW 2142
Spare Parts
Tel (03) 9518 3888
Fax (03) 9518 3838
Free Call 1800 337 963
Fax (03) 9518 3895
Free Call 1800 337 963
Fax (03) 9518 3895
QUEENSLAND
30 Prosperity Place
Geebung QLD 4034
Spare Parts
Free Call 1800 337 963
Fax (03) 9518 3895
SOUTH AUSTRALIA
Suite 8/71 Fullarton Rd
Kent Town SA 5067
Spare Parts
Tel (08) 8431 0522
Free Call 1800 337 963
WESTERN AUSTRALIA
PO Box 689
Joondalup Business Centre WA 6027
Spare Parts
Tel (08) 9305 8855
Free Call 1800 337 963
NATIONAL COVERAGE FOR 24 HOUR SERVICE OR MAINTENANCE DIAL
FREE CALL 1800 622 216 (AUSTRALIA ONLY)
CANADA
Lessard Agencies Limited
PO Box 97
Stn “D”
Toronto, ONT M6P 3J5
Tel (416) 766 2764
Fax (416) 760 0394
Free Call 1 888 537 7273
NEW ZEALAND
CHRISTCHURCH
16 Osborne St
PO Box 10-001
Christchurch
Spare Parts
Free Call 0800 Moffat
(0800 663 328)
Tel (03) 389 1007
Fax (03) 389 1276
AUCKLAND
4 Waipuna Road
Mt Wellington
Auckland
Spare Parts
Revision 1/F3508
Tel (09) 570 6630
Fax (09) 570 0099
Free Call 0800 Moffat
(0800 663 328)
-42-
UNITED KINGDOM
Units 6-7 Mount St
Business Park
Birmingham B7 5QU
England
Tel 0121-327 5575
Fax 0121-327 9711
UNITED STATES OF AMERICA
1-35 Business Center
Building 1
12000 Crown Point Drive, Suite 100
San Antonio, Texas 78233
Tel 1-800-551 8795
Fax 210-590 9479
NATIONAL COVERAGE FOR SERVICE OR MAINTENANCE DIAL
FREE CALL 1800 551 8795 (USA ONLY)
Revision 1/F3508
-43-